1 . 已知函数
,且
.
(1)求
;
(2)若
,求实数
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72d469ce65946f01efaa25b4a317c678.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dec65a2bec3d4296c613a80b3ae41d5e.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caa16aea6803864cc915c63e8ee9936c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a73b85378c1f65d0ca0e4c30a14ccee2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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名校
2 . 若单位向量
,
的夹角为
,则
与
的夹角的余弦值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1a63ab608517bb10aa036783dfb51f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b83c5803cc8c05849028a57c4bd4ee72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bca35e52b8430246a1cf96e9e617cce.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2024-04-01更新
|
1625次组卷
|
3卷引用:青海西宁市湟川中学2023-2024学年高三下学期开学考试理科数学试题
名校
解题方法
3 . 如图,在
中,点D在边BC上,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/9/c2bee236-5410-4fbe-b480-c471936550b9.png?resizew=162)
(1)若
,
,
,求AB;
(2)若
是锐角三角形,
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8cabcef1cee1213140371c499339864.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/9/c2bee236-5410-4fbe-b480-c471936550b9.png?resizew=162)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30befab772a51c5727293a5cd056879e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4494a85de0be0b97a69348115aef8513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffe7a93172d308a58200e3c722fe1072.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8d34198d24fd3ee8dfc0f81a5479b6d.png)
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2024-03-29更新
|
1335次组卷
|
3卷引用:青海西宁市湟川中学2023-2024学年高三下学期开学考试理科数学试题
青海西宁市湟川中学2023-2024学年高三下学期开学考试理科数学试题(已下线)专题1.11解三角形常考大题归类-重难点突破及混淆易错规避(人教A版2019必修第二册)河南省郑州市宇华实验学校2023-2024学年高二下学期3月月考数学试题
解题方法
4 . 设集合
,则
等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba91c8e06397557ac77db21089562ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fdbfa7a63fdf5717d40c8c9a73ec160.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
5 . 已知函数
,则
的值为_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fc0a78a8eba610a44e0e05ae1b18d90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c71df8065fd36174caafd509b6e9bd2c.png)
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6 . 下列各图象表示的函数有零点的是( )
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
7 . 函数
的图象是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f05f8a6ca406a2672875a362b8c7a805.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
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8 . 已知集合
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b40e3497c225de08f3f15d842c5acc74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b74367a4085c9c7f90f713ee0d88d845.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b9b470218359a4a47be9244980489e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
9 . 已知函数
在区间
上单调递减,则a的取值范围为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4e115fb1ba967d80d3ce9f484bc148a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/127d9b34229f1ce8a7ecdf4cb8ae7b49.png)
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解题方法
10 . 根据抛物线的光学性质可知,从抛物线的焦点发出的光线经该抛物线反射后与对称轴平行.已知抛物线C:
,如图,点F为C的焦点,过F的光线经拋物线反射后分别过点
,
.
(1)求C的方程;
(2)设点
,若过点
的直线与C交于R,T两点,求
面积的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3764ba3aa0a241787f4661026bb14053.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdfdbde5e45f33dd3eab3fcf45e796ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df7790bf081318706b9962b6aba7784f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/10/c80cf00c-4b20-441f-9719-061653c773d5.png?resizew=121)
(1)求C的方程;
(2)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b3126e09b4d8e177e618d0169dd98d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44bdbc62c678a23e5e7fc8c34ffbf257.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cce634840a967c7a7444c0b079538320.png)
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